Answer:
Pathos.
Step-by-step explanation:
Pathos is an appeal to the emotion of an audience. In this form of persuasion, a speaker tends to persuade his/her audience based on emotions such as sympathy, anger, sorrow, etc.
The word pathos is derived from the Greek word pathea which means 'suffering' or 'experience.'
In the given speech, delivered by Martin Luther King Jr., he has used the rhetoric of pathos. It is because the device that he has used in the speech, parallelism, in 'now is the time' evokes emotions and appeals to the audience's emotions that they need to rise against segregation and move towards the path of racial justice. The words such as 'segregation,' 'racial justice,' 'brotherhood' all contribute to this rhetorical device of pathos.
So, the correct answer is option B.